Perriman, who has been sidelined since the first day of training camp, had just returned to practice last week after being sidelined since the first day of training camp, but then appeared to aggravate the injury during an on-field workout before the Ravens-Bengals game on Sunday.

Speaking on the Ravens pregame show on WBAL Radio, Harbaugh confirmed that Perriman went to see Dr. James Andrews, and after an initial consulation on Wednesday underwent the arthroscopic procedure Thursday morning.

"He didn't see anything new," Harbaugh said. "There's no new injury of any kind. It's just a slow-healing ligament, for whatever reason. Very slow. They're a little surprised to say the least that it's healing this slowly, but that's what it's doing, and so it's just going to be a matter of time."

"It's going to be a little bit of time, hopefully shorter rather than longer," he added, "and we'll keep working hard to try to get him back."

The Ravens receiver corps could use Perriman.

Other than Steve Smith Sr., no Ravens receivers have distinguished themselves yet this season .No. 2 receiver Kamar Aiken played 63 snaps against Cincinnati on Sunday and was targeted just once, with no catches. He and Marlon Brown each have six catches through three games.

Enjoying a game at M&T Bank Stadium just became a little more affordable.

On Thursday, the Ravens introduced their new "Flock Friendly Fare," reducing the price of 21 of their most popular food and beverage items.

The change comes as the organization focuses on revamping the fan experience in 2018. Fans will see an average of 33 percent in total savings and up to 53 percent savings on a single item.

"As a lot of you probably know, after every game we survey fans to see how we're doing; what have we done well and what have we not done well. Over the years, one of the biggest criticisms we received was for the gameday concessions prices," Ravens President Dick Cass said on the team's website.

Alcoholic beverages were all reduced by $1 with the addition of domestic 12 ounce beer for $5.

Chicken tenders with fries went from $11 to $7, while a slice of pizza went from $8.50 to $6. No single item will cost above $9.

On average, you will now be able to feed a family of four for $44 compared to $66.75 in years past. To see all of the reductions, click the arrow in the post below.

In 2017, the Atlanta Falcons reduced their concession prices upon opening their brand new Mercedes-Benz Stadium. The Ravens, however, are expecting to lose $1.5 million in concession revenue due to the change.

Flacco - who is entering his 11th season with the organization - is experiencing a decline in his performance of late, one that can not be put entirely on his shoulders as the team has failed in finding him valuable weapons to throw to. Nonetheless, Flacco's projected 2018 season is very much up in the air and it appears Vegas is betting on the one-time Super Bowl MVP to bounce back.

However, the Ravens have failed to make the playoffs four of the last five seasons, and if that trend continues into 2018, the rookie could get his shot at flipping the script.

If you're a betting man, it could payoff to bet the over on Jackson. Low risk, seemingly high reward.